Which component provides the gas-tight seal when inlet and exhaust valves are closed?

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Multiple Choice

Which component provides the gas-tight seal when inlet and exhaust valves are closed?

Explanation:
Valves must be held tightly seated to prevent gas leakage, and that closing force comes from the springs. The valve springs push the inlet and exhaust valves against their seats, so the mating surfaces form a gas-tight seal when the valves are closed. Hydraulics would drive movement, not the sealing force in this context; pneumatic cushions are for damping, and magnetic seals aren’t used for standard valve sealing.

Valves must be held tightly seated to prevent gas leakage, and that closing force comes from the springs. The valve springs push the inlet and exhaust valves against their seats, so the mating surfaces form a gas-tight seal when the valves are closed. Hydraulics would drive movement, not the sealing force in this context; pneumatic cushions are for damping, and magnetic seals aren’t used for standard valve sealing.

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